In one of her first interviews since giving birth May 27 to daughter Shiloh, Angelina Jolie says, "The more children I have, the more I feel it's my duty" to advocate for women and children in developing countries.

Jolie, who also has a son, Maddox, 4, and daughter Zahara, 1, graces the cover of Forbes' annual power list of 100 "hottest movie stars, musicians and athletes," on stands today. But she's not No. 1. Rather, she's tied at No. 35 with Jennifer Aniston — the ex-wife of Shiloh's dad, Brad Pitt.

Tom Cruise takes the list's top honor. The reason: His lucrative $67 million back-end deal for War of the Worlds. Pitt (No. 20) is the only other solo actor in the top 20.

Jolie talks candidly about her work with the United Nations and her celebrity: "I have all that gossip that has gotten out of control. And my work in Washington and with the U.N. gets people to focus on other things."

The actress, who left Namibia with her family last weekend, says she plans to be in Washington, D.C., on Tuesday for World Refugee Day. Before she was named a goodwill ambassador, she told U.N. officials that her bad-girl reputation in Hollywood made her a poor choice, but they took her on, anyway. "In my early 20s, I was fighting with myself. Now I take that punk in me to Washington, and I fight for something important."